my 6.40 installation dumps quite early with the message:
The step check_base_software with step key (...) was executed with status ERROR. In the log file, there is the message "The database software on the host has the version: 74, the software on CD: 75. The database client software is out of range. Upgrade the database client software and retry this installation!"
I deleted my 630 before starting, including the SAPDB manager version 74 and SQLStudio, as well as most registry entries (I still have the ABAP engine 620 though, but I'd like to keep it and it worked fine in parallell with my old 630).
What's the problem?